LM99 - 采用 TruTherm 技术且具有 SMBus 接口的远程和本地温度传感器

LM99是TI德州仪器公司的一款远程温度传感器产品，LM99是采用 TruTherm 技术且具有 SMBus 接口的远程和本地温度传感器，本站介绍了LM99的封装应用图解、特点和优点、功能等，并给出了与LM99相关的TI元器件型号供参考。

LM99 - 采用 TruTherm 技术且具有 SMBus 接口的远程和本地温度传感器 - 远程温度传感器 - 温度传感器和控制IC - 德州仪器

产品描述

The LM99 is an 11-bit remote diode temperature sensor with a 2-wire System Management Bus (SMBus) serial interface. The LM99 accurately measures: (1) its own temperature and (2) the temperature of a remote diode-connected transistor such as the 2N3904 or a thermal diode commonly found on Graphics Processor Units (GPU), Computer Processor Units (CPU or other ASICs. The LM99 remote diode temperature sensor shifts the temperature from the remote sensor down 16°C and operates on that shifted temperature:

TACTUAL DIODE JUNCTION = TLM99 + 16°C

The local temperature reading requires no offset.

The LM99 has an Offset Register which provides a means for precise matching to various thermal diodes.

The LM99 and LM99-1 have the same functions but different SMBus slave addresses. This allows for one of each to be on the same bus at the same time.

Activation of the ALERT output occurs when any temperature goes outside a preprogrammed window set by the HIGH and LOW temperature limit registers or exceeds the T_CRIT temperature limit. Activation of the T_CRIT_A occurs when any temperature exceeds the T_CRIT programmed limit.

产品特性

Accurately Senses the Temperature of Remote Diodes
Offset Register Allows Use of a Variety of Thermal Diodes
On-board Local Temperature Sensing
10 Bit Plus Sign Remote Diode Temperature Data Format, 0.125 °C Resolution
T_CRIT_A Output Useful for System Shutdown
ALERT Output Supports SMBus 2.0 Protocol
SMBus 2.0 Compatible Interface, Supports TIMEOUT
8-Pin VSSOP Package

Key Specifications

Supply Voltage 3.0 V to 3.6 V
Supply Current 0.8 mA (typ)
Local Temp Accuracy (Includes Quantization error)
- TA = 25°C to 125°C ±3.0°C (Max)
Remote Diode Temp Accuracy (Includes Quantization Error)
- TA = 30°C to 50°C, TD = 120°C to 140°C ±1.0°C (Max)
- TA = 0°C to 85°C, TD = 25°C to 140°C ±3.0°C (Max)

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